// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_PUBLIC_BROWSER_MESSAGE_PORT_DELEGATE_H_
#define CONTENT_PUBLIC_BROWSER_MESSAGE_PORT_DELEGATE_H_

#include <vector>

#include "base/strings/string16.h"
#include "content/common/content_export.h"

// Windows headers will redefine SendMessage.
#ifdef SendMessage
#undef SendMessage
#endif

namespace content {

// Delegate used by MessagePortService to send messages to message ports to the
// correct renderer. Delegates are responsible for managing their own lifetime,
// and should call MessagePortService::OnMessagePortDelegateClosing if they are
// destroyed while there are still message ports associated with them.
class CONTENT_EXPORT MessagePortDelegate {
public:
    // Sends a message to the given route. Implementations are responsible for
    // updating MessagePortService with new routes for the sent message ports.
    virtual void SendMessage(
        int route_id,
        const base::string16& message,
        const std::vector<int>& sent_message_ports)
        = 0;

    // Requests messages to the given route to be queued.
    virtual void SendMessagesAreQueued(int route_id) = 0;

protected:
    virtual ~MessagePortDelegate() { }
};

} // namespace content

#endif // CONTENT_PUBLIC_BROWSER_MESSAGE_PORT_DELEGATE_H_
